PLATE 76 



Effect of formalin and copper sulphate on wheat and of copper sulphate on barley, 

 with and without presoaking: 



1. Marquis wheat: A, B, control, 76 per cent germination; C, D, seeds treated with 

 formalin i to 320 for 6 hours, 57 per cent germination; E, F, seeds pre"soaked 6 hours, 

 then formalin i to 320 for 6 hours, 77 per cent germination. 



2. Marquis wheat: A, B, control, 84 per cent germination; C, D, seeds treated with 

 copper sulphate i to 80 for ^.^ hoiu", and limed, 65 percent germination; E, F, seeds 

 presoaked 6 hours, then copper sulphate i to 80 for % hour, and limed, 79 per cent 

 germination. 



3. Tennessee winter barley: A, B, control, 89 per cent germination; C, D, seeds 

 treated with copper sulphate i to 80 for yi hour, and limed, 72 per cent germination; 

 E, F, seeds presoaked 6 hours, then copper sulphate i to 80 for % hour, and limed, 

 83 per cent germination. 



